Very laconic, Ferb is not actually shy like one would assume, but very courageous and clever. Quick thinking and on his feet about things, Ferb is a mechanical and technical genius, Ferb has built a plethora of things, from a roller coaster to a rocket to robots.

Lawrence and Linda got married, and Ferb was joined by a stepbrother and stepsister, Phineas and Candace. Phineas and Ferb developed a very strong bond, making them more than step brothers, but also best friends. ("Mom's Birthday", "Rollercoaster")

Summer adventures

Beginning months

Phineas realizes that summer doesn't last forever, and decides to make summer last by doing outrageous things. Phineas and Ferb decide to build a rollercoaster that extends from their backyard to all over town. Not only did they create a rollercoaster, but they created a beach in their backyard as well, where Ferb sang his first song, Backyard Beach. A short while after that, Ferb became a member of the Phineas and the Ferb-Tones, where they became one-hit wonders in just a day. ("Rollercoaster", "Lawn Gnome Beach Party of Terror", "Flop Starz")

Ferb helped Phineas remodel Mount Rushmore for Candace's birthday, carving Candace's face into the sculpture. Ferb was also a very successful time-traveler, since he and Phineas fixed a time machine at the local museum, traveling back in time to 300 million B.C. Phineas and Ferb accidentally brought Candace with them, breaking the time machine in the process. Together they took the time to practice patience while Isabella and the Fireside Girls created another time machine to retrieve them. ("It's About Time!")

Phineas and Ferb helped reunite Love Händel back together for their parents' anniversary. While Phineas was trying to talk the band members into getting back together, Ferb started making music with random objects to help start a song. Later that day, Love Händel was reunited. ("Dude, We're Getting the Band Back Together!")

Ferb and his stepbrother went into space to see the star his father had bought for them. Their sister accidentally tagged along though, and the three went on a perilous journey through the galaxy. Surviving an asteroid field and other dangers, they ran out of fuel and stopped at an asteroid where a milkshake bar stood. There, Phineas and Ferb found out that it was really a star and they owned it. Phineas and Ferb returned home and accompanied Isabella to the Night of the Falling Stars dance. ("Out to Launch")

Middle months

Phineas and Ferb were asked for help by their friend, Baljeet, to help him build a portal to Mars. They successfully built it, helping Baljeet get an A++ for his science grade. Ferb also received a camera and a chemistry set from Bastille Day. He used the chemistry set to help Baljeet grow his shrunken watermelon to be 50 feet tall, and the camera to make friends with Nosey, the Lake Nose Monster. ("Unfair Science Fair", "Attack of the 50 Foot Sister", "The Lake Nose Monster")

Ferb and his brother met Meap, a cute space alien who was searching for his nemesis, Mitch. Phineas and Ferb accidentally knocked his spaceship into their backyard because they were playing baseball. Meap ran off with Candace to her Bango-Ru convention. While Phineas was busy trying to find Meap with his Cute-O-Meter, Ferb was repairing Meap's spaceship. ("The Chronicles of Meap")

Ferb eventually met his neighbors' relatives, whom were named Thaddeus and Thor. Ferb bears an uncanny resemblance to Thor, and sure enough, it turns out that the two like to build stuff as well as Phineas and Ferb do. They then compete on who can build the biggest backyard fort, and of course, Phineas and Ferb's fort wins. ("Thaddeus and Thor")

Like his step-brother Phineas, he is persistent in making summer great.

Skills

Ferb is good at playing the guitar, saxophone, trombone, synthesizer/keyboard, maracas, tambourine, bass, trumpet, bagpipes, harmonica and the drums. He is very intelligent and can think on the spot. He can ride and owns a bike.

Ferb has mechanical and technological skill. He has almost single-handily built a roller coaster and track, a real radio-controlled race car, several arenas and stadiums, a space laser (which was supposed to be an ice cream maker but the plans got accidentally switched), a monster truck, a shrinking submarine, and a time machine.

Relationships

Phineas is not just Ferb's stepbrother, he is also his best friend. Ferb always helps Phineas with their daily activities. If it wasn't for Phineas' creativity and Ferb's knack for inventing things, their daily activities would never happen.
An infrequent running gag in the series is that Phineas accidentally causes Ferb bodily harm as a result of the latters obliviousness (One Good Scare Ought To Do It!, Chronicles of Meap).

The two have known each other for almost their whole lives, and spend every second of the day together. Perhaps the greatest example of the two's everlasting friendship is when Phineas states that he couldn't ever ask for a better brother than he.

Ferb helped Candace countless times, and loves her as a brother loves a sister. He helped build Candace plenty of things, with help from Phineas. Not much is known of Ferb and Candace's relationship, due to the fact that Ferb rarely speaks to her at all.

Isabella is good friends with Ferb, perhaps because he's the stepbrother of her crush, Phineas.

Isabella obviously does not have romantic interest in Ferb like she does with Phineas. However, when Candace implies to Isabella that she may instead end up marrying Ferb, Ferb responds by giving a winking look in her direction, implying that he may have some affection for her, in spite of his crush on Vanessa. ("Phineas and Ferb's Quantum Boogaloo")

When Ferb was picking up plans for their latest contraption, he first meets Vanessa Doofenshmirtz. He develops romantic attraction to her, which leads to a mix-up between the plans he was picking up and those that Vanessa was picking up for her father. When later asked by Phineas how he got the plans confused, Ferb responds "I was weak." ("I Scream, You Scream")

Ferb encounters Vanessa again while test-driving Meap's spacecraft. When he sees that he passed by her, he backs up the spacecraft and looks at her as if he were trying to flirt with her. She responds by smiling at him in a way that suggests she may have some affection for him as well. ("The Chronicles of Meap")

During "Vanessassary Roughness", Ferb repeatedly offers his help to Vanessa, even though he is initially rebuffed. She learns his name, and calls it out when she was in trouble. She even kisses him on the cheek at the end.

Friends

Best Friends

Close Friends

Frienemeies

Other Friends

Background Information

"Ferb" is revealed to be a shortened version of his actual name. The birthname of the man whom Ferb is named and based on is Frank, so it is likely the same goes with the cartoon Ferb.[1]

He has one eye that is larger than the other. The eye furthest away from the viewpoint of the audience is one that is always larger. When Ferb turns his head, the size of both eyes change, swapping sizes (the small eye enlarges and the large eye shrinks). However, his right eye is the larger of the two when he is viewed head on. This may be an homage to Bill the Cat, the feline from Berkeley Breathed's various comic strips. Bill's eyes also change size, with the larger eye always being closest to the reader's viewpoint.

In the Original Pitch, Ferb is one of the few characters to remain pretty much the same as his initial outcome. The only difference is that he doesn't speak at all. This could be that the creators didn't intend on Ferb ever speaking.